Abbott a



Jan. 15, 1924. 1,481,209

A. A. KAUFFMAN BRIDGE TOOTH AND LOCK IN BACKING Filed June 21, 1925 WITNESSES mvsuron QawTTAKaUFFMaN A TTORNE Y8 Patented Jan. 15, 1924.

UNlTEB STATES PATET @FFEQE.

ABBOTT A. HUFFMAN, OF ERODKILY'N, NEW 203K.

BRIDGE TQGTEI AND IKJCK-IN BACKING.

Application filed June 21,

To all whom it may concern:

Be it knownthat I, Anmrrr A. KAUFFMAN, a citizen ofthe United States. and a resident of the city of New York borough of Brooklyn, in the county of ings and State of New York, have inventei'l a new and Improved Bridge Tooth and Loch-In Backing, of which the foilowing is a full, clear, and exact description.

This invention has relation to dental bridgeworir and has particular reference to a bridge tooth and look-in backing.

The present invention contemplates an improvement in the mode of attachment of the bridge tooth to the bridge whereby the tooth is more firmly united with'the bridge, but. is nevertheless capable of ready removal therefrom in event of its breakage and the necessity of replacement.

As a {other oo'ect the invention eontemplntes n bridge for anchoring a bridge tooth to the abutment. teeth, which :1 'ionstitute a backing for the bridge tOOLl) and whioh is concealed from View when in place.

As :1 still further object the invention contemplates :1 bridge tooth designed to include a. porcelain tip, and where required an integral. root in the original baking.

The invention furthermore oomprehends a bridge tooth and bridge which is compare-- tively simple in its construction. inexpensive to produce and install and highly efiicicnt in its Purpose.

Vrith the above received and other objects in view. the invention resides in the novel construction set forth in the following specification, particularly' pointed out in the appended chums and illustrated in the accompanying drawings, it being understood that the right is reserved to embod iinents other than those actually illustratedberein to the full extent indicated by the general meaning of the terms in which the claims are expressed.

. In the drawings- Fignre 1, is a rear view of the bridge tooth in lace.

- F ig. '2 is an enlarged vertical sectional view through the some taken approximately on the line 2-4! of Fig. 1.

Fig. 3 a horizontal sectional view taken approximately on the lingo-3 of Fig. 1.

Fig. 1 is a perspective View of the bridge tooth alone.

Fig. 5 is a. similar view of the bridge alone.

.The bridge member which.

1923. Serial No. 843.862.

Referring to the drawings in: mar-asters of reference. A designates a se iion of the gum and ii the abutment teeth between which the artificial bridge tooth is adopted to be arranged. The bridge tooth. constituting a part of the invention designated generally by the reference diameter it: is th vided with a wide peripheral recess 11 viiich extends around the lingual or rear of the tooth and around the mosial and distal sides of the tooth. The tooth may be provided with or without an integral root 12. if do sired, which is designed to seat in the socket of the root of the original tooth. The bridge tooth 1G is further or 'lt'lti with a horizontal bore 13 which or s inwartlhv from the rent of the tooth short of the front or bur-cot f. vertical bore 14 extends inwardly t outer end of the tooth and int: horlzontal bor 13. 'iho bore 1; rates at itsxonier and, ti-i7. .ln':

part of the invention and orally by the reference cl substantially EIt'llfilO formation to snugi fit the recess 11 whereby to embrace the bridge tooth and form a hackin therefor. From the eentrai inner portion of the bridge member a tongue 17 conforming Silbfiiulllifllij to the ironfiguration of the horizoinal recess 13 is provided and the free inner end of the tongue "ii" is formed with on interiorly threaded vertical opening iii. The opposite sides of the bridge it: {are uited enrhomd to the abutment teeth B by shit-ring the same to an inlay or crown. it? n the shutment teeth or in any other an? able manner. the form of oonneetirm betn' sides of the bridge member and the a tment teeth constitute no yarto? the i? "notion. A screw consising ot' a shank 2t! having a threaded end 21 and kerled. end. is in sorted in the vertical bore it after the bridge member 16 is agopiied to the bridge tooth. The threndedeini 2} of the shank is engaged within the threaded opening: 18 of the tongue.

-From the foregoing consti'in-tion and rangement it will be seen thet a bridge tooth and bridge has been prrwide i which are firmly united with 23" er :m-ii n which the bridge member o ing' for the bridge tooth. preferably be of porcelain in necessary shades and molds in its original baking a porcelain tip and where required an integral root. It thus follows that the expensive operation of baking on a porcelain tip is eliminated and the bridge tooth will be substantially anchored to the bridge member.

I claim:

1. A brid e tooth and a bridge member embracing t e rear and side faces of said bridge tooth. said bridge member provided with anchorin means for connecting the same with the a utment teeth, means extending inwardly from the bridge member into the bridge tooth, and an anchoring member extendingthrough the outer end of the bridge tooth and intersecting said means for establishin a connection betweenthe inner and of sai means and the bridge tooth.

2. A bridge tooth having intersecting vertical and horizontal bores and a bridge member countersunk in the rear and side portions of the periphery of the tooth, said bridge member provided with a tongue extending into the horizontal bore, and means extending into theverticul boreand interengaging' the tongue. 1

3. A bridge topthhaving a peripheral recess in the sides and rear faces of the tooth and having belies extending inwardly from the outer end and rear'sid'eof the tooth, sold bores'intersectihg each other attheir inner ends and an arcuate bridge "member-"adapted to be anchored to the abutment teeth and fitting into' one of said recesses, a tongue having a threaded aperture inits inner end carried by the bridge member and extendin into one of the recesses with the threadei aperture aligning with the other recess, and a retainin screw inserted in the other recess and three. edly engaging the threaded apere ture in the ton ue.

, A BOTT A. KAUFFMAN. 

